用am，is或are填空，然后总结其用法。

(1)That's my father and this ________ my mother.

(2)This is my cousin and that ________ my sister.

　　(3)－________she your sister?

　　－Yes, she ________.

　　(4)－And ________ he your brother?

　　－No. He's my friend.

　　(5)－________ Guo Peng your brother?

　　－Yes, he ________.

(6)I ________ his friend. I'm not his brother.

　　(7)－________ you Jack's brother?

　　－No, I'm not. I ________ his cousin.

(8)These ________ my grandparents.

　　(9)－________ this your aunt?

　　－Yes, it ________.

(10)These ________ my parents, those ________ my grandfather and grandmother.

(11)These are my brothers. They ________ Jeff and Jack.

(12)They aren't my sisters. They ________ my friends.

am用于第一人称单数I之后；is用于第三人称单数ge，she，it以及相当于he，she或it；are用于第二人称或所有人称的复数，表达“是”的意思。可用下面的口诀来帮助记忆：“我用am你用are，is用于他她它，复数全都要用are”。

I am…可以缩写成I'm，he is可以缩写成 he's，she is可以缩写成加she's，it is可以缩写成it's，而we are，you are，they are可分别编写成we're，you're，they're。am，is，are的否定形式是在后面加not，如：am not，is not，are not。is not通常缩写为isn't，而are not通常缩写为aren't。如：

(1)I'm Alice, I'm not Mary. She's Mary.

(2)This isn't my brother. He's my cousin.

(3)They're my brothers. They aren't my friends.

1．I won't be able to finish the housework without your help．（改为同义句，以下同）

  1 won't be able to finish the housework                         you                       help me．

2．I'm glad that my grandfather is healthy now．

  I'm glad that my grandfather is in                                                    now．

3． Work hard, or you will fall behind others．

                           you                       work hard，you will fall behind others．

4．1 am not sure what I can buy for my mother．

  I am not sure what                          for my mother．

5．如果你上学迟到了，老师将不让你进去。（完成翻译句子；以下同）

                          you are late for school, the teacher                            let you in．

6．那时她靠在街上卖报纸谋生．

  She                          a                           by selling newspapers in the street in those days．

7．昨天我和同学争吵起来，事后我感到很后悔。

  I             my classmate yesterday．After that I felt very sorry．

8．课后我们应多讲英语。

  We should speak English as                     as                         after class．

9．你不应该在阅览室里吸烟。

You                                                           to smoke in the reading-room．

10．请把书拿去给他并把词典给我带来。

Please                       the book to him and                            the dictionary to me．

1.用英语说那是什么？

What’s that _________ __________?

2.它是什么颜色？他是黑白相间的。

_______ ________ is it?It’s _________ __________ _________.

3.她姓什么？

What’s ________ _________ _________?

4.这是你的钥匙吗？ 不是。是她的。

Is this ________ _______ ? _______,it _______. _______  is ______ key.

5.你的电话号码是多少？

What’s your _________ __________?

6.那是我祖父母。

________ are _________ __________.

7.你如何拼写它？

________ do you _________ it ?

8.这是我的全家福。

Here is my ________ __________.

9.他不是我爷爷

______ ________ _________ grandfather.

10.请拨打514-1234 找艾伦练习.

Please ________ Alan ________ 514-1234.